Atoms with same number of neutrons, but different number of nucleons are called___________________?

A. α-ray
B. Proton
C. Position
D. β-ray

A. 1
B. 2
C. 3
D. 7

A. β-rays
B. X-rays
C. γ-rays
D. Ultra violet rays

A. U-235
B. U-238
C. Pb-206
D. Bi-209

A. Less atomic number
B. Less atomic weight
C. More atomic number
D. More atomic weight

A. Plutonium-239
B. Uranium-235
C. Uranium-233
D. Thorium-232